#include <stdio.h>

int main()
{
    int c,s;
    float p,w,d,f;
    printf("please enter price, weight, discount:");
    scanf("%f,%f,%d",&p,&w,&s);
    if(s>=3000) c=12;
    else
    c=s/250;
    switch(c)
    {
        case 0: d=0;break;
        case 1: d=2;break;
        case 2:
        case 3: d=5;break;
        case 4:
        case 5:
        case 6:
        case 7: d=8;break;
        case 8:
        case 9:
        case 10:
        case 11:d=10;break;
        case 12:d=15;break;
    }
    f=p*w+s*(1-d/100);
    printf("freight=%10.2f\n",f);
    return 0;
}